Set of artificial teeth.



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CARL RAUHE, OE DSSELDORF, GERMANY.

SET OF ARTIFICIAL TEETH.

Specification of Letters Patent.

Patented May 22, 1906.

Application filed January 6, 1906. Serial No. 294,852.

1'0 LLM whom it may concern:

Be it known that I, CARL RAUHE, dentist, a citizen of the German Empire,residing at Dsseldorf, Germany, have invented certain new and usefulImprovements in Sets of Artificial Teeth, of which the following is aspecification.

My invention relates to a contrivance for retaining a set of artificialteeth in position by atmospheric pressure. Said contrivance gives therubber disk fixed to the denture the form of a cup, which shape isnecessary to obtain the suction. At present the rubber disk is broughtinto this form by means of central pressure by the fastening screw orrivet or such against the plate, or else by a stud fixed to the denture.The shank of the stud being shorter than the thickness of the rubbercollar gives the latter, by means of compression, the necessary cupshape. In both these cases the rubber is dished or turned up at theedges by means of central pressure. In consequence of the squeezingagainst the denture the india-rubber disk gets brittle and crumbly andloses its power of adhesion and suction in a very short time.

The object of my invention is to remove the disadvantage set forth. Thisis done by means of a new contrivance of the suctioncavity containingthe suction rubber disk, illustrated by the accompanying enlargeddrawings, in-

Figure l in cross-section without the rubber disk, and in Fig. 2 incross-section with the rubber disk embedded in.

In order to give the rubber disk the cup form, the bottom of thesuction-cavity a 1s formed at an ascending angle from the middle, andthe central retaining-plate I) or the under edge of the head of stud orscrew for the rubber disk c has a corresponding angle of ascent, asshown in the drawings, thus being parallel to the bottom of the cavity.

In consequence of the new form of the suction-cavity the rubber diskreceives the cuplike form without any pressure and being free from theresulting expansion will last much longer than by the old method offastening. To allow the outside rim of the rubber disk to recede whenplacing the denture in the mouth, the outside edge or circumference ofthe cavity a is deepened, as shown in the drawings.

I claiml. Suction-cavity for artificial teeth with a bottom ascendingangle from the center to give the suction-rubber the necessary cuplikelform for suction, substantially as delscribed and for the purpose setforth.

2. Suction-cavity for artificial teeth with a bottom ascending anglefrom the center and a stud for retaining the rubber disk with ascendingline parallel to the bottom of the cavity, substantially as describedand for the purpose set forth.

8. Suction-cavity for artificial teeth with a bottom ascending anglefrom the center and the outside edge or circumference of the bottomdeepened, substantially as described and for the purpose set forth.

In testimony whereof I have hereunto subscribed my name in the presenceof two witnesses.

CARL RAUHE.

Witnesses WILLIAM EssENwEIN, PETER LIEBER.

